63 km ESE of Knik River, Alaska

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 0.95 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.0 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 16,000,000× the energy of this one
2. Magna, Utah 2020 M 5.7 11,000,000× the energy of this one
3. Around the size people start to feel M 3.0 1,000× the energy of this one
4. This earthquake M 1.0 about 0.95 lb of TNT

Energy from the Gutenberg–Richter relation (log₁₀E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km since 2016 was M 4.3 on 2024-11-13 — about 89,000 times the energy of this one.

Before 2016, the USGS record lists 24 earthquakes of M5 or more within 50 km; the five largest:

1. 9.2 The 1964 Prince William Sound, Alaska Earthquake · 43 km SE of this epicentre Mar 28, 1964
2. 6.8 31 km SSW of Glacier View, Alaska · 36 km N of this epicentre May 4, 1934
3. 6.6 57 km ENE of Whittier, Alaska · 21 km SSE of this epicentre Feb 23, 1925
4. 6.6 37 km WNW of Tatitlek, Alaska · 36 km ESE of this epicentre Jul 12, 1983
5. 6.4 22 km ENE of Whittier, Alaska · 46 km SSW of this epicentre Jan 4, 1933

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 61.2070, -147.8560. Map © OpenStreetMap contributors.

Nearby places

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

46 earthquakes have been recorded within 50 km since this one.

1. 1.4 19 km S of Glacier View, Alaska 16:37 UTC
2. 2.0 52 km E of Whittier, Alaska 12:54 UTC
3. 0.9 64 km S of Glacier View, Alaska 10:30 UTC
4. 1.0 66 km WNW of Tatitlek, Alaska 04:24 UTC
5. 1.5 50 km WNW of Tatitlek, Alaska 16:14 UTC
6. 1.4 30 km NNE of Whittier, Alaska 13:58 UTC
7. 1.5 47 km WNW of Tatitlek, Alaska 13:17 UTC
8. 1.6 63 km S of Glacier View, Alaska 04:55 UTC
9. 1.8 46 km NW of Tatitlek, Alaska 04:23 UTC
10. 1.3 44 km E of Whittier, Alaska 04:17 UTC
11. 0.7 33 km NNE of Whittier, Alaska 09:06 UTC
12. 1.2 61 km S of Glacier View, Alaska 07:06 UTC
13. 1.3 64 km NW of Tatitlek, Alaska 19:18 UTC
14. 1.2 48 km NW of Tatitlek, Alaska 19:03 UTC
15. 1.4 51 km NE of Whittier, Alaska 18:41 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 23:18 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

Revisions

USGS refines a solution as more stations report. Every change we have seen is listed here.

On USGS

• The official USGS event page — the source of record for every value above
• Did you feel it? Report it to USGS — reports go to USGS, not to us
• ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.